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PM: Drop pm_flags that is not necessary

Browse source 
The variable pm_flags is used to prevent APM from being enabled
along with ACPI, which would lead to problems.  However, acpi_init()
is always called before apm_init() and after acpi_init() has
returned, it is known whether or not ACPI will be used.  Namely, if
acpi_disabled is not set after acpi_init() has returned, this means
that ACPI is enabled.  Thus, it is sufficient to check acpi_disabled
in apm_init() to prevent APM from being enabled in parallel with
ACPI.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Len Brown <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2011-02-15 21:22:24 +01:00
commit 6831c6edc7
5 changed files with 7 additions and 48 deletions
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22
drivers/acpi/bus.c
View file

@ -1007,8 +1007,7 @@ struct kobject *acpi_kobj;
static int __init acpi_init(void)
{
int result = 0;
int result;
if (acpi_disabled) {
printk(KERN_INFO PREFIX "Interpreter disabled.\n");
@ -1023,29 +1022,18 @@ static int __init acpi_init(void)
init_acpi_device_notify();
result = acpi_bus_init();
if (!result) {
pci_mmcfg_late_init();
if (pm_apm_enabled()) {
printk(KERN_INFO PREFIX
"APM is already active, exiting\n");
disable_acpi();
result = -ENODEV;
} else {
pm_set_acpi_flag();
}
} else
if (result) {
disable_acpi();
if (acpi_disabled)
return result;
}
pci_mmcfg_late_init();
acpi_scan_init();
acpi_ec_init();
acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();
return result;
return 0;
}
subsys_initcall(acpi_init);